Really sorry about your accident.
Make sure there is no frame damage reported by BMW or by the insurance co. You can find out by asking if they will have to do any welding of the frame. We were rear-ended in a similar way in our VW Passat 5 years ago while we still lived in the U.S. The car was only 9 months old. The damages totaled $6,500. Given the sustained damages over $5,000 the state couldn't give us a "clean” title anymore after that. Most states make you report damages over a certain amount.
We just got back from the States. Made a trip to sell the Passat as our X1 will be delivered hopefully this week. To our surprise AutoCheck was reporting frame damage confirmed later by Carmax. This never appeared in our work receipt by the VW authorized shop, but somehow they reported it to the insurance. At any rate, we finally sold it to a private party, but we had to sacrifice a big chunk of money in the sale price. In retrospect we wish the insurance co. had just totaled the car in the first place. The accident was never our fault, but we lost left and right.